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      <a href="#Communicating-Parties" title="Communicating Parties"></a>
      Communicating Parties
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    Two parties are involved in a Production Performance Management Protocol message exchange: the sender and the receiver. The sender pushes a message to the receiver. Usually the sender is a machine or a sensor of a machine.
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    <p>
    The receiver waits for messages. It offers a API that allows for sending either measurement payloads or message payloads.
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    The communication is unidirectional. Only the sender can contact the receiver and send messages. No feedback from receiver to sender is provided.
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    <img class="is-centered" src="images/collaborators_v2.svg" alt="Overview Production Performance Management Protocol" title="Overview Production Performance Management Protocol" />
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